I will update this post as this changes overtime and add new information

PURCHASING ATLA/LOK

You can purchase ATLA/LOK digitally on iTunes, Vudu, Amazon Digital, Google Play, and Microsoft Movies & TV. I would recommend buying the complete series as it’s cheaper than buying the seasons individually. Waiting for a sale may be best as the digital copies are more expensive ($60 for the complete series in HD/1080p, $50 SD - iTunes recently had a sale for the whole series at $50, Book 1 at $10, and Vudu had LOK for $30). The Vudu copy of LOK comes with free featurettes within each season.

Recently a Blu-Ray edition of ATLA was released, and is available across many retailers. Note: These do not contain the "Previously on Avatar" segments, if you really wish to have those look into the DVD edition - See here for details on this.

Korra Blu-Ray has been available for a few years now.

STREAMING (SUBSCRIPTION BASED)

Country List

USA

Currently, there is no legitimate way to watch ATLA or Korra with a subscription service such as Hulu, Netflix, or Amazon Prime in the USA. However, you can purchase the episodes on Amazon digitally.

Nick.com has some or all the episodes available, but you need to authorize with your cable provider (and not all, notably comcast, are supported). Recent access issues has been reported with this method as well, with some episodes not being available or the service being down.

UK

neither series on Netflix

ATLA and LOK on Amazon prime.

Canada

All ATLA seasons are available on Netflix

Mexico

All ATLA seasons are available on Netflix. Korra is not available.

France

All ATLA seasons are available on Netflix

Germany

All ATLA seasons are available on Netflix

All seasons of ATLA and Korra are on Amazon Prime Video

Netherlands

Korra can be watched on Amazon Prime

Atla season 2 can be watched on Prime

Sweden

*ATLA may not be available on NetFlix

Colombia

All ATLA seasons are available on Netflix

Brazil

All ATLA seasons are available on Netflix. Korra is not available.

New Zealand

ATLA and LOK are both available on NEON and Amazon Prime.

New Zealand Netflix does not have either.

India

voot.com offers the show

Country not specified:

Users outside of America report ATLA is available on Netflix generally, depending on the nation. (Feel free to chime in with your country)

I'm not sure on Korra, access may vary from country to country (Feel free to chime in with your country).

The Blu-Ray editions may be directly purchasable at a local retailer or may need to be imported.

All Countries except USA

Amazon Prime Video may have ATLA and Korra available to stream

What to expect on each continent:

Feel free to correct in comments

Africa

Doesn't seem to be available even in more well off regions, must be imported

Europe

Expect ATLA to be available on Netflix, and Amazon Prime may carry it alongside LOK.

Asia

Unsure, feel free to contribute

Southeast Asia

Likely Available on Australian and New Zealand Netflix, not known for other nearby countries.

Americas

Outside the USA it may be available on Netflix.

May be Available on Amazon Prime

Comics

Comics can be purchased online. Local Comic stores may carry all, recent, or popular comics of the series. You should be able to import the comics except in locations with extreme trade restrictions. They may be available for digital purchase on some ebook platforms.

If you know something I don't, please comment below it will be used to update this list. Do so with your country so I can specify it.

Now I don’t want to hear „Oh Aang would have had it so easy if he was in Korras place“ and I don’t wanna hear „Oh Korra would have beaten everyone in ATLA easily huh duh“. We simply don’t know what would have happened. That’s why I want to have this discussion. More precisely:

Where do you think Korra would have struggled the most in Aangs journey?

Where do you think Aang would have struggled the most in Korras journey?

Where do you think Korra would have had it relatively easy in Aangs story compared to Aang?

Where to you think Aang would have had it relatively easy in Korras story compared to Korra?

Go wild guys! But please stay civil and respectful! None of that Aang is stronger than Korra or Korra is stronger than Aang.